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  • 科目:英语
  • 题型:单选题
  • 难度:较难
  • 人气:1183

— Food problem is becoming a big one in China!
—I think the food ________ before going to shops or supermarkets.

A.is checked B.is checking C.should be checked D.should check
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—Foodproblemisbecomingabigonei